Simmons Double Tapped Check Valve is crafted with a durable silicone bronze cast body and poppet, ensuring long-lasting performance. This valve features a buna-n O-ring, stainless steel spring, washer, and locknut, designed to provide reliable operation under a working pressure of 400 PSI. It is suitable for cool water applications only, making it i for systems that require dependable pressure control. Available in sizes 1" and 1-1/4", this spring-loaded check valve combines quality materials and precise engineering to maintain system integrity and prevent backflow effectively. Model Number: 542SB